Tube mill



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m I a v J. FERENCZ.

TUBE MILL.

APPLICATION FILED APR. 30. 1921.

' ,428,687, I v PatentedSept. 12, 19 22.

\ 2 SHEETS-SHE!!! 2 Patented ept. 12, 19252.

JOSE FERENCZ, CURITYBA, PA'RANA, BRAZIL.

TUBE MILL.

Application filed April 30, 1921.

T 0 all whom it may concern.

Be it known that I, Josn Fnnnnoz, a citizen of Austria, but having declared my intention to become a citizen of the Republic of Brazil. residing at Cnrityba, State of Parana Brazil, have invented certain new and useful Improvements in Tube Mills, of which the following is a specification.

This invention relates to grinding mills or machinery of the typeknown as ball and tube mills the particular object of the present invention being 'to provide a grinding" machine of the stated' type in which the ball or roller will be held in a fixed position relative to the drum or tube and will be prevented from clinging to the wall of the tube. A further object of the invention is to provide a grinding machine of the stated type which may be more economically operated than was possible with the machines heretofore produced. The invention is illustrated in the accompanying drawings and will be hereinafter fully described, the novel features beingsubsequently mrticularly pointed out in the claim.

In the drawings- Figure 1 is a longitudinal section showing the eharzu teristic features of a machine embodying my present improvements;

Fig. 2 is an end view of the same;

is a view partly in longitudinal section and partly in elevation of a complete machine embodying my improvements;

Fig. 4t is an end view thereof;

Fig. 5 is aview similar to .llig; 3' but showing allilferent embodiment of the invention;

Fig. 6 is a transverse section on the line 6(i of Fig. 5; 7

Figs. 7 and. S are elevations of different forms of drums or tubes in which my improvements may be embodied;

Fig. 9 is a. longitudinal section illi'istratins; another development of the invention;

Fig. 10 is a transverse section'sh'owing the essential elements of another form of the invention.

Reduced to its simplest form, the machine of my present invention embodies a drum or tube 1 having hollow trunnions 2 at its ends and within the said drum is a roller 8 carried by a shaft 4 which projects through the hollow trunnions 2, as clearly shown. Rotation is imparted to either the roller or the drum and the material to be ground may be fed into the drum through one trunnion 2 and withdrawn therefrom by suction Serial No. 465,692.

through theother trunnion. In Fig. 3, I have shown the drum 5 as elongated relative to the showing in Fig. 1 and equipped at one end with a swinging closure 6 to facilitate the assembling of the rollers 7 within the drum. The drum is preferably provided with internalrings 8 so that the wear upon the drum will be minimized and if any one ring should become worn through a new ring may be substituted therefor without requiring the provision of a new drum as will be readily understood. At both ends of the drums are hollow trunnions 9 which are iournaled' in anti-friction bearings 10 pro vided therefor upon the upper ends of pedestals or posts 11 erected upon the floor of the workroom or upon some other substantial fixed support. The'roller 7 in this form of the invention is provided in a plurality of members corresponding tofthe, rings 8 and is carried by the roller shaft 12 which extends through the hollow trunnions 9, as clearly shown spacers 13 being provided upon the shaft between adjacent'rollers, as shown, so that the proper relation between the rollers and the respective rings may be maintained. In this illustration of the inventiom a band pulley 14 is shown secured upon the shaft 12 near one end thereof so that power may be applied thereby to 1'0- tate the rollers and the shaft is mounted at its extremities in supporting arms 15 which are pivoted at their rear ends tobracke'ts 16 secured to a wallor other fixed support.

The material to be ground, which may be ore, rock, or other materiah is n'eferably fed into the drum or tube throi'lgh one of the hollow trunnions 9 and is withdrawn through the other trunnion by suction. Power being applied to the pulley 14s, the rollers are caused to rotate so that they roll upon the material between them and the re spectively adjacent rings 8 and thereby crush the material and also effect rotation of the drum so that the material is being constantly carried to and'under the rollers to be crushed. While the pivotally mounted supporting arms 15Kwill permit a slight vertical. movement of the rollers they restrain the rollers against that close adherence to the interior of the drum which occurs ordinarily under centrifugal action when the drums are rotated at high speed and forms one serious objection to machines of this class as heretofore constructed. When the rollers or balls were free within face of the drum.

the drum, the centriiiugal action which followed the rapid rot. ion oi the drum would cause the balls or rollers to follow the surface of the drum and hence theywould not grind the material fed into the drum. Moreover, in order to get any grinding action at all itwas necessary to employ the balls or rollers in suea numbers that the weight was very heavy and a very large proportion of the power applied to the machine as spent in overcoming the inertia of the mass 01 balls or rollers. As a result of my invention, however, the grinding rollers may be much lighter than the mass of balls or rollers heretofore employed and the machine may be operated at high speed, a very small proportion of the power applied to the machine being wasted in overcoming the inertia of any of the parts. This desirable result is due in a large measure to the provision of the supporting arms 15 which hold the rollers at the center of gravity and tend to maintain them in operative relation to the lowest point ot the inner surtace ot' the drum.

In Fig. 5, I have shown a drum 2O mounted in bearings 21 at the upper ends of pedestals 22 and provided. with hollow trunnions 28 engaging in the said bearings. One of the trunnions is elongated and a driving pulley 2st is secured upon the same so that in this embodiment of the invention the driving force will be applied to the drum. To one of the pedestals 22, I secure a standard. 25 from the upper end of which an arm 26 extends inwardly through the respectively adjacent trunnion 23 and upon the inner extremity of this arm within the drum I provide the lug 27 in which is fixed one end of a bar or rod 28 extending longitudinally within the drum and tl'lrough the grinding rings 29 secured upon the inner It will be noted that a space, indicated at 30, is provided between the innermost rings 29 and a hanger 31. extends from the shaft or rod 28 within the said space, the end ot said hanger carrying the shaft 32 upon which the grinding rollers are secured. If desired, the end of the rod 28 opposite the end shown in the drawings may be mounted in a support C01? responding to the elements 25, 26 and 27 and secured to the :nljaeeut pedestal 22, but this specific arrangement is not necessary and, as indicated by dotted lines in Fig. 5, a hanger similar to the hanger 31 may be pro vided at the end of the bar 28 remote from the illustrated lug 27 The druinneed not be of the true cylindrical shape illustrated in Figs. 1 to 6 but may be of the stepped conical formation shown in F 7 or of the form shown in F 8 in which the ends 34: of the drum are conical or tapered.

The shaft carrying the grinding roller need not be mounted in a fixed or swinging support as illustrated in Figs. 5 and 4, respectively, but may be equipped at its ends with links 85 upon the lower ends 0t which weights 36 are carried, as shown in Fig. 9. It is also within the scope of my invention to employ a plurality of grinding rollers disposed in the same transverse plane of the drum and in Fig. 10 I have illustrated the drum 40 as housing a series of rollers ll arranged in triangular relation and held in that relation by links 42.

It will be readily noted that in all the illustrated forms of the invention the grind ing roller or rollers will roll or glide upon the material to be ground and will. not impose a lifting strain upon the driving force. The arms 15, the supporting yoke composed of the members 25, 26, 27 and 28 and the weights 36 hold the grinding roller to the lowest point of the grinding drum so that the weight of the roller will be exerted constantly upon the material fed into the drum and will tend constantly to grind and crush said material, and whether the driving force be applied to the drum or to the roller it is applied directly without the interposition of any train of gearing or system of bolts and the waste of power in overcoming the triotional resistance of the working parts is .minimized. The machines may be, there- .tore, operated at high speed and as a result can he made in smaller dimensions for an equal load than has been heretofore possible.

Having thus described the invention,

' what is claimed as new is:

The combination of a pair of pedestals, fixed bearings thereon, a drum disposed. between said pedestals and having hollow truunions at its ends journaled in said bearings, a standard secured on one pedestal, an arm extending from said standard through the adjacent trui'lnion, a bar carried by said arm and disposed longitudinally within the drum, and grinding rollers suspended from said bar within the drum to co-operate with the inner surface of the drum for grinding material "fed into the drum.

In testimony whereof I aliix my signature.

DR. JOSE FlflR-ENGZ. [us] 

